java link

[kt_vidhya]

hai guys

i like to have a link feature in a java.
i mean the same link object we have in html.i want to have a text in an applet.if i click on that text it should go to another page.Dont use URL object.No listeners. it should be in the JTable
please answer this as soon as possibe.its urgent.

[mjpell]

Try this class. Specifially, see the catch blocks in the DisplayURL() methods.


package dataccesstool.utilities;

import netscape.javascript.*;
import java.io.IOException;

/**
* A simple, static class to display a URL in the system browser.


*
* Under Unix, the system browser is hard-coded to be 'netscape'.
* Netscape must be in your PATH for this to work. This has been
* tested with the following platforms: AIX, HP-UX and Solaris.


*
* Under Windows, this will bring up the default browser under windows,
* usually either Netscape or Microsoft IE. The default browser is
* determined by the OS. This has been tested under Windows 95/98/NT.


*
* Examples:


*
BrowserControl.displayURL("http://www.javaworld.com")
*
BrowserControl.displayURL("file://c:\\docs\\index.html")
*
BrowserContorl.displayURL("file:///user/joe/index.html");
*

* Note - you must include the url type -- either "http://" or
* "file://".
*/
public class BrowserControl
{
// Used to identify the windows platform.
private static final String WIN_ID = "Windows";

// The default system browser under windows.
private static final String WIN_PATH = "rundll32";

// The flag to display a url.
private static final String WIN_FLAG = "url.dll,FileProtocolHandler";

// The default browser under unix.
private static final String UNIX_PATH = "netscape";

// The flag to display a url.
private static final String UNIX_FLAG = "-remote openURL";
/**
* Display a the DATAccess Tool web site's home page in the browser.
*/
public static void DisplayDATaccessToolHomePage()
{

try
{
JSObject win = JSObject.getWindow(dataccesstool.gui.DATAccessToolApplet.GetSingleton());
String[] args = {""};
win.call("datHome", args);
}
catch (Throwable e) //most likely a null pointer because not running as applet
{

Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL");
Logger.LogException(e);

String urlString = "http://elvis5\\MIS_www\\APPL_DEV\\Ctar\\DataAccess\\default.html";
DisplayURL(urlString);

}
}
/**
* Display a the DATAccess Tool web site's home page in the browser.
*/
public static void DisplayDATaccessToolSupportPage()
{

try
{
JSObject win = JSObject.getWindow(dataccesstool.gui.DATAccessToolApplet.GetSingleton());
String[] args = {""};
win.call("datSupport", args);
}
catch (Throwable e) //most likely a null pointer because not running as applet
{

Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL");
Logger.LogException(e);

String urlString = "http://elvis5\\MIS_www\\APPL_DEV\\Ctar\\DataAccess\\support.html";
DisplayURL(urlString);

}
}
/**
* Display a the Sas Help page in the browser.
*/
public static void DisplaySasHelpPage()
{

try
{
JSObject win = JSObject.getWindow(dataccesstool.gui.DATAccessToolApplet.GetSingleton());
String[] args = {""};
win.call("sasHelp", args);
}
catch (Throwable e) //most likely a null pointer because not running as applet
{

Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL");
Logger.LogException(e);

String urlString = "http://elvis5\\MIS_www\\APPL_DEV\\Ctar\\DataAccess\\support.html";
DisplayURL(urlString);
}
}
/**
* Display a file in the system browser. If you want to display a
* file, you must include the absolute path name.
*
* @param urlString the file's url (the url must start with either "http://" or "file://").
*/
public static void DisplayURL(String urlString)
{

try
{
//java.net.URL url = new java.net.URL(urlString);
//dataccesstool.gui.DATAccessToolApplet.GetSingleton().getAppletContext().showDocument(url);
//dataccesstool.gui.DATAccessToolApplet.GetSingleton().getAppletContext().showDocument(new java.net.URL("javascript:jumpTo(\""+urlString+"\")"));

JSObject win = JSObject.getWindow(dataccesstool.gui.DATAccessToolApplet.GetSingleton());
String[] args = {urlString};
win.call("jumpTo", args);


}
catch (Throwable e) //most likely a null pointer because not running as applet
{
Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL");
Logger.LogException(e);

boolean windows = IsWindowsPlatform();
String cmd = null;
try
{
if (windows)
{
// cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
cmd = WIN_PATH + " " + WIN_FLAG + " " + urlString;
Process p = Runtime.getRuntime().exec(cmd);
}
else
{
// Under Unix, Netscape has to be running for the "-remote"
// command to work. So, we try sending the command and
// check for an exit value. If the exit command is 0,
// it worked, otherwise we need to start the browser.

// cmd = 'netscape -remote openURL(http://www.javaworld.com)'
cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + urlString + ")";
Process p = Runtime.getRuntime().exec(cmd);
try
{
// wait for exit code -- if it's 0, command worked,
// otherwise we need to start the browser up.
int exitCode = p.waitFor();
if (exitCode != 0)
{
// Command failed, start up the browser

// cmd = 'netscape http://www.javaworld.com'
cmd = UNIX_PATH + " " + urlString;
p = Runtime.getRuntime().exec(cmd);
}
}
catch (InterruptedException x)
{
System.err.println("Error bringing up browser, cmd='" + cmd + "'");
System.err.println("Caught: " + x);
}
}
}
catch (IOException x)
{
// couldn't exec browser
System.err.println("Could not invoke browser, command=" + cmd);
System.err.println("Caught: " + x);
}
}
}
/**
* Display a file in the system browser. If you want to display a
* file, you must include the absolute path name.
*
* @param urlString the file's url (the url must start with either "http://" or "file://").
*/
public static void DisplayURL(String urlString, java.applet.Applet anApplet)
{

try
{
JSObject win = JSObject.getWindow(anApplet);
String[] args = {urlString};
win.call("jumpTo", args);
}
catch (Exception e) //most likely a null pointer because not running as applet
{
Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL");
Logger.LogException(e);
boolean windows = IsWindowsPlatform();
String cmd = null;
try
{
if (windows)
{
// cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
cmd = WIN_PATH + " " + WIN_FLAG + " " + urlString;
Process p = Runtime.getRuntime().exec(cmd);
}
else
{
// Under Unix, Netscape has to be running for the "-remote"
// command to work. So, we try sending the command and
// check for an exit value. If the exit command is 0,
// it worked, otherwise we need to start the browser.

// cmd = 'netscape -remote openURL(http://www.javaworld.com)'
cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + urlString + ")";
Process p = Runtime.getRuntime().exec(cmd);
try
{
// wait for exit code -- if it's 0, command worked,
// otherwise we need to start the browser up.
int exitCode = p.waitFor();
if (exitCode != 0)
{
// Command failed, start up the browser

// cmd = 'netscape http://www.javaworld.com'
cmd = UNIX_PATH + " " + urlString;
p = Runtime.getRuntime().exec(cmd);
}
}
catch (InterruptedException x)
{
System.err.println("Error bringing up browser, cmd='" + cmd + "'");
System.err.println("Caught: " + x);
}
}
}
catch (IOException x)
{
// couldn't exec browser
System.err.println("Could not invoke browser, command=" + cmd);
System.err.println("Caught: " + x);
}
}
}
/**
* Try to determine whether this application is running under Windows
* or some other platform by examing the "os.name" property.
*
* @return true if this application is running under a Windows OS
*/
public static boolean IsWindowsPlatform()
{
String os = System.getProperty("os.name");
if (os != null && os.startsWith(WIN_ID))
return true;
else
return false;
}
/**
* Simple example.
*/
public static void main(String[] args)
{
DisplayURL("http://www.javaworld.com");
}
/**
* Quit the applet because of normal termination.
*/
public static void QuitApplet(String urlString, java.applet.Applet anApplet)
{

//if (anApplet == null)
//javax.swing.JOptionPane.showMessageDialog(null, "anApplet is null","BrowserControl.quitApplet()", javax.swing.JOptionPane.INFORMATION_MESSAGE);

try
{
JSObject win = JSObject.getWindow(anApplet);
//System.out.println("Win = " + win.toString());
String[] args = {urlString};
win.call("quitApplet", args);

}
catch (Exception e) //most likely a null pointer because not running as applet
{
//System.out.println("in catch: " + e.getMessage() + "\n" + e.getClass());
Logger.LogException(e);
Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL from quitApplet()");


boolean windows = IsWindowsPlatform();
String cmd = null;
try
{
if (windows)
{
// cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
cmd = WIN_PATH + " " + WIN_FLAG + " " + urlString;
Process p = Runtime.getRuntime().exec(cmd);
}
else
{
// Under Unix, Netscape has to be running for the "-remote"
// command to work. So, we try sending the command and
// check for an exit value. If the exit command is 0,
// it worked, otherwise we need to start the browser.

// cmd = 'netscape -remote openURL(http://www.javaworld.com)'
cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + urlString + ")";
Process p = Runtime.getRuntime().exec(cmd);
try
{
// wait for exit code -- if it's 0, command worked,
// otherwise we need to start the browser up.
int exitCode = p.waitFor();
if (exitCode != 0)
{
// Command failed, start up the browser

// cmd = 'netscape http://www.javaworld.com'
cmd = UNIX_PATH + " " + urlString;
p = Runtime.getRuntime().exec(cmd);
}
}
catch (InterruptedException x)
{
System.err.println("Error bringing up browser, cmd='" + cmd + "'");
System.err.println("Caught: " + x);
}
}
}
catch (IOException x)
{
// couldn't exec browser
System.err.println("Could not invoke browser, command=" + cmd);
System.err.println("Caught: " + x);
}
}
}
/**
* Quit the applet because of abnormal termination.
* urlString param is actually ignored....
*/
public static void QuitAppletAbnormally(String urlString, java.applet.Applet anApplet, String errorMsg)
{
// javax.swing.JOptionPane.showMessageDialog(null, urlString,"quit abnormal url", javax.swing.JOptionPane.INFORMATION_MESSAGE);


try
{
JSObject win = JSObject.getWindow(anApplet);
String[] args = {urlString};
win.call("quitAppletAbnormally", args);

}
catch (Exception e) //most likely a null pointer because not running as applet
{
Logger.LogException(e);
Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL from quitAppletAbnormally()");

boolean windows = IsWindowsPlatform();
String cmd = null;
try
{
if (windows)
{
// cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
cmd = WIN_PATH + " " + WIN_FLAG + " " + urlString;
Process p = Runtime.getRuntime().exec(cmd);
}
else
{
// Under Unix, Netscape has to be running for the "-remote"
// command to work. So, we try sending the command and
// check for an exit value. If the exit command is 0,
// it worked, otherwise we need to start the browser.

// cmd = 'netscape -remote openURL(http://www.javaworld.com)'
cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + urlString + ")";
Process p = Runtime.getRuntime().exec(cmd);
try
{
// wait for exit code -- if it's 0, command worked,
// otherwise we need to start the browser up.
int exitCode = p.waitFor();
if (exitCode != 0)
{
// Command failed, start up the browser

// cmd = 'netscape http://www.javaworld.com'
cmd = UNIX_PATH + " " + urlString;
p = Runtime.getRuntime().exec(cmd);
}
}
catch (InterruptedException x)
{
System.err.println("Error bringing up browser, cmd='" + cmd + "'");
System.err.println("Caught: " + x);
}
}
}
catch (IOException x)
{
// couldn't exec browser
System.err.println("Could not invoke browser, command=" + cmd);
System.err.println("Caught: " + x);
}
}
}
/**
* Initiates an email to the DATAccess Tool Support team. This
* is only useful if we're running as an applet.
*/
public static void SendEmailToSupportTeam(java.applet.Applet anApplet)
{

try
{
JSObject win = JSObject.getWindow(anApplet);
String[] args = {""};
win.call("sendEmailTo", args);

}
catch (Exception e) //most likely a null pointer because not running as applet
{
Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL from quitApplet()");
Logger.LogException(e);
}
}
/**
* Display a page in the browser to inform user that we've stopped opening a 2nd
* instance of the Tool.
*/
public static void StopSecondInstance(String htmlPage, dataccesstool.gui.DATAccessToolApplet applet)
{
String pageString = htmlPage;
if (htmlPage == null || htmlPage.equals("") )
pageString = "StopSecondInstance.html";

try
{
JSObject win = JSObject.getWindow(dataccesstool.gui.DATAccessToolApplet.GetSingleton());
String[] args = {pageString};
win.call("jumpTo", args);
}
catch (Throwable e) //most likely a null pointer because not running as applet
{

Logger.LogTraceStatement("Unable to call Applet's showDocument() to present URL");
Logger.LogException(e);

String urlString = "http://elvis5\\MIS_www\\APPL_DEV\\Ctar\\DataAccess\\"+ pageString;
DisplayURL(urlString);
}
}
}